<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
    <title>Title</title>
</head>
<body ng-app="myApp" ng-controller="validateCtrl"
      name="myForm">

<h2>验证实例</h2>

    <p>用户名:<br>
        <input type="text" name="user" ng-model="user" required>
        <span style="color:red" ng-show="myForm.user.$dirty && myForm.user.$invalid">
<span ng-show="myForm.user.$error.required">用户名是必须的。</span>
</span>
    </p>

    <p>邮箱:<br>
        <input type="email" name="email" ng-model="email" required>
        <span style="color:red" ng-show="myForm.email.$dirty && myForm.email.$invalid">
<span ng-show="myForm.email.$error.required">邮箱是必须的。</span>
<span ng-show="myForm.email.$error.email">非法的邮箱地址。</span>
</span>
    </p>

    <p>
        <input type="submit"
               ng-disabled="myForm.user.$dirty && myForm.user.$invalid ||
myForm.email.$dirty && myForm.email.$invalid">
    </p>


<script>
    var app = angular.module('myApp', []);
    app.controller('validateCtrl', function($scope) {
        $scope.user = 'John Doe';
        $scope.email = 'john.doe@gmail.com';
    });
</script>

</body>
</html>